Crossword Genius

Extractor of secrets from PM on TV (6)

Ross

I believe the answer is:

hacker

I'm a little stuck... Click here to teach me more about this clue!

'pm on tv' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for hacker that I've seen before include "Modern criminal who breaks into computers" , "potentially a threat to security" , "Modern burglar who breaks in to computer systems" , "One imposing cuts" , "Modern criminal who breaks into computer systems" .)

I've seen this clue in The Times.
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